Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
so sanh » do sanh
nam xuc » cam xuc, nam xua, nam thuc
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sanh) or (toc sach)) ky nang x hoi. hieu van nam xuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (toc sach)) ky nang x hoi. hieu van nam xuc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((so sanh) or (toc sach)) ky nang x hoi. hieu van nam xuc van hanh vi cua tre*.